C++ usage in embedded systems

Question

What features of C++ should be avoided in embedded systems?

Please classify the answer by reason such as:

• memory usage
• code size
• speed<

Answer 1

One particular problem that surprised me with ATMega GCC 3.something: when I added a virtual ember function to one of my classes, I had to add a virtual destructor. At that point, the linker asked for operator delete(void *). I have no idea why that happens, and adding an empty definition for that operator slolved the problem.